My summer drink of choice lately has been gold tequila and Fresca. Quite refreshing! ← Squirt is probably the most common and popular mixer for tequila in Mexíco. Basically, Squirt:Tequila::Coke:Rum. My favorite way to mix a grapefruit soda drink is to use mineral water (or, club soda) and Florida's Natural not-from-concentrate Ruby Red grapefruit juice. It is far superior to the other grapefruit juice brands you will find at your local grocery store. This way, you can adjust the sweetness to you taste and to the application.